Tank for air compressors



Jan. 19, 1932. HOBART 1,842,173

TANK FOR AIR COMPRESSORS Original Filed Aug. 31, 1928 2 Sheets-5heet 1 [N I/ENTOR EDWARD A. HOBART A TTORNEY Jan. 19, 1932. E. A. HOBART 1,842,173

TANK FOR AIR COMPRESSORS Original Filed Aug. 31, 1928 2 Sheets-Sheet 2 IN VENTOR EDWARD A. HOBART A TTOKNEY Patented Jan. 19, 1932" UNITED STATES :PATENT OFFICE EDWARD A. HOBART, OF TROY, OHIO, ASSIG-NOB TO THE HOBART BROS. COMPANY, OF TROY, OHIO, A CORPORATION OF OHIO TANK non AIR oom-rnnssons Original application filed August 31, 1928, Serial No. 1929. Serial This invention relates to air compressors, and especially to that type of air compressor used in connection with inflating automobile tires and is adapted for automatic operation.

It is an object of this invention to provide a device of this type in which there is an intermediate reservoir or tank which is located between the compressor apparatus and the main tank or reservoir. It is the purpose of this reservoir to permit of the pressure being low at the time the operation of the compressor begins, regardless of the pressure in the main tank or reservoir.

It is also an object of this invention to pro vide a device of this kind in which any oil or water present in the air is trapped and can be removed therefrom.

It is a further object of this invention to provide an automatic switch operating device in which the operating means is maintained in the condition free from moisture, oil and other foreign matters that might be injurious to the parts of the switch operating mechanism.

It is a further object of this invention toprovide a compressor in which the tank is composed of sheet metal with the parts welded together and having on the end a ring with an outstanding supporting flange, to which the super-structure of the compressor is attached.

It is also an object of this invention to provide a compressor of the tank as above described, supporting a compressor mechanism consisting of a motor and its cooperating gear mechanism securely mounted in a housing just above the tank. In said mechanism the motor shaft is directly connected to the gearing that operates the compressor itself.

It is a further object of this invention to provide, in connection with the operating parts, an oil reservoir by which the bearings may be well lubricated.

It is a still further object to provide a compressor composed essentially of a main tank with the compressor actuating means mounted on said tank with compressor cylinders, an auxiliary tank, and a manifold immediately mounted on top of the operating machinery. By this means there is provided a compressor $03,209. Divided and this application filed July 15 No. 378,310.

that is compact and one in which the parts are mounted one on the other, so that the whole assembled device will occupy a minimum of space with the parts so attached that there is no play or movement, in order that the connecting pipes will not become loosened.

For the purposes of illustration thereis presented here a preferred embodiment of this invention, but it is not the intention of applicant to be limited by the form of device shown in the accompanying drawings.

Thisapplication is a division of my application, Serial No. 303,209, filed August 31, 1928.

Referring to the drawings,

Figure 1 is .a side View of the device showing part of the tank in section.

Figure 2 is a side view of the main tank.

I Figure 3 is a view of the ring mounted upon a tank.

Figure 4 is a sectional view of the lower part of the tank.

Referring to the drawings in detail, this invention comprises essentially a main reservoir, a compressor and an intermediate reser volr.

The condensed air is first forced by the compressor into the intermediate tank or reservoir, from which it passes into the main tank or reservoir and is retained therein by means of a check valve, leaving the intermediate reservoir more or less in a condition that the air. will leak out and become of substantially the same pressure as atmospheric air.

1 indicates the main tank or reservoir which is cylindrical in shape. On top of this tank is mounted a ring 2 having holes 3 for the purposeof having the super-structure attached to the ring. There extends from the ring 2 a flange 4 which extends into the inside of the tank 1 and is welded tothe side of the tank, being therefore substantially integral with the main walls of the tank.

The upper closure of the tank is composed of a concaved saucer-like structure 5. The edge of this closure is bent up to form wall shaped parts which contact withthe walls of the tank .and is welded .thereto. 7 On the lower part of the tank there is a ring Very similar to ring 2 but instead of fitting on the inside of the tank it fits on the outside and is represented by the numeral 6. In this ring there are suitable holes indicated by 7, for the purpose of attaching it to any support or base structure. This ring 6 also has an upwardly extending flange 8 which is also attached to the outside wall of the tank and is welded thereto.

These closures, both upper and lower, being welded on the tank, compose the tank structure which is formed of substantially one piece of metal. Fitted within the lower part of the tank there is a bottom closure 9, substantially the same shape as the upper closure and placed in the tank in substantially the same relation as the upper closure. This bottom closure has a flange extending around the lower inside part of the tank and is welded thereto, the same as the upper closure 5.

Mounted upon the tank 1 and fixed thereto by bolt or screw means extending through the holes 3, there is mounted a motor and a cam means for operating the compressor. The motor casing is indicated by 10, while the casing that contains the cam is indicated by 11. This casing 11 also contains oil or a suitable lubricant for lubricating the machinery enclosed therein.

Casings l0 and 11 are fastened together by means of screws indicated by 12, as is clearly shown by Figure 3. Mounted upon casing 11 is a compressor 13 which has extending therefrom a pipe 14 leading into a reservoir 15. This reservoir is mounted upon a plate supported on the casing 10. Upon this reservoir is a valve 16 from which a pipe 17 leads into a casing 18. The casing 18 is supported on a manifold 19 welded to one end of the plate supported on the casing 10. The end of the pipe 17 remote from the valve member 16 enters the manifold at one end thereof. On the other end of the manifold is a pressure indicating gauge 20. Ex tending from the end of the manifold adjacent the pipe 17 is a pipe leading to the tank 1. The relative positions of these parts are fully shown in Figure 1.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

In a compressor, a cylindrical tank having a concaved member closely filling in each end of the tank and welded thereto, a ring member fitting within one of the concaved end members and welded thereto and to the end of the tank, and having an outwardly turned support flange, and a second ring member welded on the outside of the other end of the tank and having an outwardly turned base flange.

In testimony whereof, I alfix my signature.

EDWARD A. HOBART. 

